return av_rescale_q(this, fs_tb, out_tb);
}
+
+int64_t av_add_stable(AVRational ts_tb, int64_t ts, AVRational inc_tb, int64_t inc)
+{
+ AVRational step = av_mul_q(inc_tb, (AVRational) {inc, 1});
+
+ if (av_cmp_q(step, ts_tb) < 0) {
+ //increase step is too small for even 1 step to be representable
+ return ts;
+ } else {
+ int64_t old = av_rescale_q(ts, ts_tb, step);
+ int64_t old_ts = av_rescale_q(old, step, ts_tb);
+ return av_rescale_q(old + 1, step, ts_tb) + (ts - old_ts);
+ }
+}